Improved frequency-dependent transient transmission line model
Abstract
Scope of this thesis is the development of a frequency-dependent multiphase power transmission line transient model, which is based on the generalized nodal analysis and is suitable for transient simulations both in frequency- and time-domain. Initially, modal analysis is presented, which is a valuable tool for the decoupling and further solution of the telegrapher’s equations. Under this framework, a new method is proposed for the calculation of frequency-dependent propagation characteristics as smooth functions of frequency. The proposed method is highly accurate, robust, numerically efficient and applicable to all types of transmission line configurations. Next, the natural frequencies of power transmission lines and their excitation in transients or under high-frequency steady-state conditions are calculated. A new technique is proposed for the calculation of natural frequencies, which is generalized and applicable to any type of transmission lines, taking fully into account the ci ...
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